Malicious PDF — malware analysis report

Static analysis result for SHA-256 d890f6b696f0af17…

MALICIOUS

PDF

41.9 KB Created: 2020-04-11 00:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 548d6b2288cede49ca9242ca314b3765 SHA-1: ead6c84d61458e9a1bb4e54f3409259002a228b7 SHA-256: d890f6b696f0af17467e0f1ef77bdc42bbe4bec41dd8dff9161ccfeda80cbaad
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to files with generic names, suggesting a link farm designed to host malicious content. The document body and heuristics indicate a lure related to downloading a schematic, likely a pretext to trick users into downloading a payload. No scripts were extracted from this sample, limiting the ability to determine the exact payload delivery mechanism.

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://djsacademy.com/uploads/1/3/1/3/131378814/131378814.html#iphone+6s+schematic+pdf+download
    • http://webmail.beautysalon73.nl/uploads/1/3/0/6/130605002/naliruni.pdf
    • http://wordgander.com/uploads/1/3/1/1/131163793/46e0f986e5eb418.pdf
    • http://toyotachr-sg.com/uploads/1/3/1/4/131437728/donajekipozum.pdf
    • http://firstautomotiveadministrators.com/uploads/1/3/0/7/130739027/tadimuzagiwori-sajugenig-kudimisaworuko.pdf
    • http://michaelapollock.com/uploads/1/3/0/5/130543141/mebiboravi-buzokevijageso-gokosabinum-pekas.pdf
    • http://techknowledgeuae.com/uploads/1/3/1/6/131637679/zogidusabu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f23.bin
7c5df7f037e618b011b72fbf41511491c4fb82d6ea7d19cd8766195f0f5313ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F23 8608 bytes
font_01_sfnt_off0000903d.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903D 2668 bytes

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